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Prefilter for gas generating air bag inflator

  • US 5,624,133 A
  • Filed: 10/26/1995
  • Issued: 04/29/1997
  • Est. Priority Date: 10/26/1995
  • Status: Expired due to Fees
First Claim
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1. An apparatus for inflating an air bag, said apparatus comprising:

  • a housing having a cylindrical inner surface defining a chamber;

    an ignitable gas generating material in the chamber for, upon being ignited, producing a flow of combustion products, including gas to inflate the air bag and hot particles; and

    a filter for removing hot particles from the flow of combustion products, said filter being a tubular cylinder and located in said chamber between said gas generating material and said housing, said filter forcefully engaging said cylindrical inner surface of said housing, said filter being contractible circumferentially and radially from a first condition for insertion into the chamber, said filter expanding circumferentially and radially toward the first condition to provide the forceful engagement with said cylindrical inner surface of said housing when the force contracting the filter is removed;

    said filter engaging said cylindrical inner surface of said housing at spaced apart locations, said filter being spaced radially from said cylindrical inner surface between said locations.

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